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	param	t-stat
$ω$	0.8762	4.66
$α$	0.1408	5.16
$β$	0.7176	15.33
$γ_{1}$	-0.7354	-4.23
$γ_{2}$	1.1973	4.53
$γ_{3}$	-0.7638	-3.43
$γ_{4}$	0.5075	2.25
$γ_{5}$	-0.4129	-1.97
$γ_{6}$	0.4844	2.86
$γ_{7}$	-0.5291	-4.01
$γ_{8}$	0.3700	2.78
$γ_{9}$	-0.1291	-1.22

V-Lab

AECOM Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Wednesday, February 11th, 2026:25.77% (-1.40%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other AECOM Analyses